Fixed bug in text editor drag+drop that could cause an undo group to stay open.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@2727 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/Libraries/ICSharpCode.TextEditor/Project/Src/Gui/TextAreaDragDropHandler.cs

@@ -95,9 +95,9 @@ namespace ICSharpCode.TextEditor
 					}
 					textArea.SelectionManager.ClearSelection();
 					InsertString(offset, (string)e.Data.GetData(typeof(string)));
-					textArea.Document.UndoStack.EndUndoGroup();
 					textArea.Document.RequestUpdate(new TextAreaUpdate(TextAreaUpdateType.WholeTextArea));
 				} finally {
+					textArea.Document.UndoStack.EndUndoGroup();
 					textArea.EndUpdate();
 				}
 			}